female gender | Modal : no | may | might | can | could | shall | should | will | would | must | ought to
English verb conjugation COULD EXIST
Regular verb: exist - existed - existed
Affirmation
Simple form
I could existyou could exist
he could exist
we could exist
you could exist
they could exist
V-ing form
I could be existingyou could be existing
he could be existing
we could be existing
you could be existing
they could be existing
Perfect
I could have existedyou could have existed
he could have existed
we could have existed
you could have existed
they could have existed
V-ing perfect
I could have been existingyou could have been existing
he could have been existing
we could have been existing
you could have been existing
they could have been existing
Negation
Simple form
I could not existyou could not exist
he could not exist
we could not exist
you could not exist
they could not exist
V-ing form
I could not be existingyou could not be existing
he could not be existing
we could not be existing
you could not be existing
they could not be existing
Perfect
I could not have existedyou could not have existed
he could not have existed
we could not have existed
you could not have existed
they could not have existed
V-ing perfect
I could not have been existingyou could not have been existing
he could not have been existing
we could not have been existing
you could not have been existing
they could not have been existing
Interrogative form
Simple form
could I exist?could you exist?
could he exist?
could we exist?
could you exist?
could they exist?
V-ing form
could I be existing?could you be existing?
could he be existing?
could we be existing?
could you be existing?
could they be existing?
Perfect
could I have existed?could you have existed?
could he have existed?
could we have existed?
could you have existed?
could they have existed?
V-ing perfect
could I have been existing?could you have been existing?
could he have been existing?
could we have been existing?
could you have been existing?
could they have been existing?
Interro-negative form
Simple form
could I not exist?could you not exist?
could he not exist?
could we not exist?
could you not exist?
could they not exist?
V-ing form
could I not be existing?could you not be existing?
could he not be existing?
could we not be existing?
could you not be existing?
could they not be existing?
Perfect
could I not have existed?could you not have existed?
could he not have existed?
could we not have existed?
could you not have existed?
could they not have existed?
V-ing perfect
could I not have been existing?could you not have been existing?
could he not have been existing?
could we not have been existing?
could you not have been existing?
could they not have been existing?